Tor Browser Version 4.0.2 - Windows 8, 7, Vista, and XP

Why Anonymity Matters

Tor protects you by bouncing your communications around a
distributed network of relays run by volunteers all around
the world: it prevents somebody watching your Internet
connection from learning what sites you visit, and it prevents
the sites you visit from learning your physical location.

What is Tor?

Tor is free software and an open
network that helps you defend against traffic analysis,
a form of network surveillance that
threatens personal freedom and privacy, confidential
business
activities and relationships, and state security. Tor is a
network of virtual tunnels that allows people and groups to
improve their privacy and security on the Internet. It also enables
software developers to create new communication tools
with built-in privacy features. Tor provides the foundation for
a range of applications that allow organizations and individuals
to share information over public networks without compromising their
privacy.